It will therefore be apparent to you that disease (when not of a group origin, or the result of planetary karma or based on accident) takes its rise in the activity or the non-activity of the centers. This is a statement of a basic truth, given in the simplest manner. The centers, as you know, govern the endocrine system which, in its turn, controls the seven major areas of the physical body and is responsible for the correct functioning of the entire organism, producing both physiological and psychological effects.

The importance of this glandular system cannot be over-estimated. It is a replica in miniature of the septenary constitution of the universe and the medium of expression and the instrument of contact for the seven ray forces, the seven Spirits before the Throne of God. Around this at present unrecognized truth the medicine and the healing methods of the future civilization will be built.

1. The etheric vehicle itself. This with its myriads of lines of force and of energy, the incoming and the outgoing energies, its responsiveness to energy impacts coming from the environment as well as from the inner spiritual man and the subtle bodies, underlies the entire physical body. In it are to be found the seven centers as focal points of reception and of distribution; they are the recipients of seven types of energy, and they distribute these seven energies through the entire little human system.

2. The nervous system and its various interlocking directorates. This is a relatively tangible network of energies and forces which are the outer expression of the inner, vital, dynamic network of the etheric body and the millions of nadis or the prototype of the nerves which underlie the more substantial body. These nerves and plexi and their many ramifications are the negative aspects of the positive energies which condition or are attempting to condition the man.

4. The blood stream. This is the carrier of the life principle and of the combined energies and forces of the three above systems. This will be an idea of some novelty to the orthodox. The relationship of the circulatory system of the blood to the nervous system has not been as yet adequately developed in modern medicine. Much, however, has been done to relate the glandular system to the blood.[143]

Only when these four interrelated systems are viewed as one integrated whole and as the four aspects of one vital circulatory system will the truth emerge. Only as they are acknowledged to be the four major distributing agents of the combined rays of the individual man will the true nature of material phenomena be grasped. It might be added here that:

1. The etheric vehicle from the circulatory angle, is governed by the Moon, as it veils Vulcan.
2. The nervous system is ruled by Venus.
3. The endocrine system is governed by Saturn.
4. The blood stream is governed by Neptune.

These four systems are in reality the manifestation of the four aspects of matter in its lowest or purely physical expression. There are other aspects of expression of the fundamental substance, but these are the four of greatest importance.